Gunsmithing and customization references?

Sorry if this question is stupid or has been answered before, but I know nothing about guns, and didn´t find anything with the search functions.

I am an amateur game designer, and I am looking for reliable references of homemade/improved weapons. As well as customizations that can be done in a small workshop by a skilled person, preferably things that are hard to produce en-masse(if any).

I did find some information on gun customization and home gunsmithing, but I I am not confident enough to judge if a site is reliable or not

Sorry if this question is stupid or has been answered before, but I know nothing about guns, and didn´t find anything with the search functions.

I am an amateur game designer, and I am looking for reliable references of homemade/improved weapons. As well as customizations that can be done in a small workshop by a skilled person, preferably things that are hard to produce en-masse(if any).

I did find some information on gun customization and home gunsmithing, but I I am not confident enough to judge if a site is reliable or not

Would anyone here be willing to point me in the right direction?

Thank you for your time

Try the High Road forums. Here is good, but folks there are deep into that kind of thing.

I have been customizing my IPSC/USPSA pistols for quite a while now as well as my precision rifles and several other firearms. I am also a tinkerer with paintball guns and air cannons(tater guns). Customizing is only limited by a few things: the platform(the gun itself), money, science, and the LAW.

Common mods to firearms are: automatic conversions, short-barreled rifle conversions, shotgun to pistol conversion, caliber changes, optics changes, milling of different components(lightening the firearm is common), addition of various lights, lasers, handles, grips, breaching devises, trigger pull adjustment,, etc. Most are limited by funding more than any other reason.

As far as homebuild items andnot customizations, you have to option of building air cannons, combustion cannons, various explosives(some simple, some far more complex and all EXTREMELY dangerous),.....

Many people tinker with stuff, check out forums that deal with firearms that are cheap. Firearms like the Ruger 10/22, Mosin Nagant, SKS, are all cheap and have had plenty of different mods done to them.

It is stupidly obvious now, but i didn´t even think about the legal aspect of it. Things that are doable but illegal due to danger are probably things that would be useful to me, but I never even thought of looking for something like that.